<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>回到顶部特效</title>
    <link rel="stylesheet" href="styles.css">
</head>
<body>
    <div class="content">
        <!-- 这里放置你的页面内容 -->
        <p>滚动页面以查看效果...</p>
        <!-- 添加足够的内容以允许滚动 -->
        <div style="height: 2000px;"></div>
    </div>
    <button id="backToTopBtn" title="回到顶部"></button>

    <script src="script.js"></script>
</body>
</html>